Home / 18,390.45-27,602.99-13,130.72

Finding the Fourth Proportional to 18,390.45, 27,602.99 and 13,130.72

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Solution

The fourth proportional to 18,390.45, 27,602.99 and 13,130.72 is: 19,708.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.45 : 27,602.99 = 13,130.72 : x
  2. Step 2: Convert to fraction form
    18,390.45/27,602.99 = 13,130.72/x
  3. Step 3: Cross multiply
    18,390.45x = 27,602.99 × 13,130.72
  4. Step 4: Simplify right side
    18,390.45x = 362,447,132.85
  5. Step 5: Solve for x
    x = 362,447,132.85/18,390.45
  6. Step 6: Final answer
    x = 19,708.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.